package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 根据时间区间统计营业额
     * @param b
     * @param e
     * @return
     */
    public TurnoverReportVO getTurnover(String b, String e) {
        log.info("b:{},e:{}",b,e);
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate begin= LocalDate.parse(b, formatter);
        LocalDate end= LocalDate.parse(e, formatter);
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);//日期计算，获得指定日期后1天的日期
            dateList.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("begin",beginTime);
            map.put("end", endTime);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        //数据封装
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }


    /**
     * 用户统计报表
     * @param b
     * @param e
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(String b, String e) {
        log.info("b:{},e:{}",b,e);
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate begin= LocalDate.parse(b, formatter);
        LocalDate end= LocalDate.parse(e, formatter);
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>(); //新增用户数
        List<Integer> totalUserList = new ArrayList<>(); //总用户数

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //新增用户数量 select count(id) from user where create_time > ? and create_time < ?
            Integer newUser = getUserCount(beginTime, endTime);
            //总用户数量 select count(id) from user where  create_time < ?
            Integer totalUser = getUserCount(null, endTime);

            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /**
     * 根据时间区间统计用户数量
     * @param beginTime
     * @param endTime
     * @return
     */
    private Integer getUserCount(LocalDateTime beginTime, LocalDateTime endTime) {
        Map map = new HashMap();
        map.put("begin",beginTime);
        map.put("end", endTime);
        return userMapper.countByMap(map);
    }

    /**
     * 根据时间区间统计订单数量
     * @param b
     * @param e
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(String b, String e) {
        log.info("b:{},e:{}",b,e);
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate begin= LocalDate.parse(b, formatter);
        LocalDate end= LocalDate.parse(e, formatter);

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while(!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
//        每天订单总数集合
        List<Integer> orderCountList = new ArrayList<>();
//        每天有效订单数集合
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
//            查询每天的总订单数：select count(id) from orders where order_time> ? and order_time<?
            Integer orderCount = getOrderCount(beginTime,endTime,null);

//            查询每天的有效订单数：select count(id) from orders where order_time> ? and order_time<? and status=?
            Integer validOrderCount = getOrderCount(beginTime,endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

//        时间区间内的总订单数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
//        时间区间内的总有效订单数
        Integer validTotalOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
//        订单完成率
        Double orderCompletionRate = 0.0;
        if(totalOrderCount!=0){
            orderCompletionRate = validTotalOrderCount.doubleValue()/totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validTotalOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据时间区间统计指定状态的订单数量
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
        Map map = new HashMap();
        map.put("status", status);
        map.put("begin",beginTime);
        map.put("end", endTime);
        return orderMapper.countByMap(map);
    }

    /**
     * 查询指定时间区间内的销量排名top10
     * @param b
     * @param e
     * @return
     * */
    @Override
    public SalesTop10ReportVO getSalesTop10(String b , String e) {
//        设置数据格式的另一种方法
        log.info("b:{},e:{}",b,e);
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate begin= LocalDate.parse(b, formatter);
        LocalDate end= LocalDate.parse(e, formatter);

        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime,endTime);

        String nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
        String numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");
        log.info("nameList:{},numberList:{}",nameList,numberList);

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessDate(HttpServletResponse response) {
        //近30天的日期
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
//        查询概览运营数据，提供给Excel模版数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN),LocalDateTime.of(end,LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
//        基于提供好的模版文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
//            获取模版文件中的sheet页
            XSSFSheet sheet = excel.getSheet("sheet1");
//            数据填充时间
            sheet.getRow(1).getCell(1).setCellValue(begin+"至"+end);
//            获取第四行
            XSSFRow row = sheet.getRow(3);
//            获取单元格
            row.getCell(2).setCellValue(businessDataVO.getTurnover()); //营业额
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());//订单完成率
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());//新增用户
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());//有效订单
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());//平均客单价

            for(int i = 0;i <30;i++){
                LocalDate date = begin.plusDays(i);
                //            准备明细数据
                businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN),LocalDateTime.of(date,LocalTime.MAX ));
//                获取某一行
                row = sheet.getRow(i+7);
//                日期
                row.getCell(1).setCellValue(date.toString());
//                营业额
                row.getCell(2).setCellValue(businessDataVO.getTurnover());
//                有效订单数
                row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
//                订单完成率
                row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
//                平均完成率
                row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
//                新增
                row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            }
//            通过输出流将文件下载客户端啊浏览器中
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

//            关闭资源
            outputStream.flush();
            outputStream.close();
            excel.close();


        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}